/*
 * Copyright 2017 Huawei Technologies Co., Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.servicecomb.transport.highway;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import io.protostuff.LinkedBuffer;
import io.protostuff.ProtobufOutput;
import io.protostuff.runtime.ProtobufFeature;
import io.servicecomb.foundation.vertx.client.tcp.AbstractTcpClientPackage;
import io.servicecomb.foundation.vertx.client.tcp.TcpClientConfig;
import io.servicecomb.foundation.vertx.client.tcp.TcpClientConnection;
import io.servicecomb.foundation.vertx.tcp.TcpOutputStream;
import io.servicecomb.transport.highway.message.LoginRequest;
import io.servicecomb.transport.highway.message.LoginResponse;
import io.servicecomb.transport.highway.message.RequestHeader;
import io.vertx.core.Context;
import io.vertx.core.buffer.Buffer;
import io.vertx.core.net.NetClient;

public class HighwayClientConnection extends TcpClientConnection {
    private static final Logger LOGGER = LoggerFactory.getLogger(HighwayClientConnection.class);

    private ProtobufFeature protobufFeature = new ProtobufFeature();

    public HighwayClientConnection(Context context, NetClient netClient, String endpoint,
            TcpClientConfig clientConfig) {
        super(context, netClient, endpoint, clientConfig);
        setLocalSupportLogin(true);
    }

    public ProtobufFeature getProtobufFeature() {
        return protobufFeature;
    }

    @Override
    protected TcpOutputStream createLogin() {
        try {
            LinkedBuffer linkedBuffer = LinkedBuffer.allocate();
            ProtobufOutput output = new ProtobufOutput(linkedBuffer);

            RequestHeader header = new RequestHeader();
            header.setMsgType(MsgType.LOGIN);
            header.writeObject(output);

            LoginRequest login = new LoginRequest();
            login.setProtocol(HighwayTransport.NAME);
            login.setUseProtobufMapCodec(true);
            login.writeObject(output);

            HighwayOutputStream os = new HighwayOutputStream(AbstractTcpClientPackage.getAndIncRequestId(), null);
            os.write(header, LoginRequest.getLoginRequestSchema(), login);
            return os;
        } catch (Throwable e) {
            throw new Error("impossible.", e);
        }
    }

    @Override
    protected boolean onLoginResponse(Buffer bodyBuffer) {
        try {
            LoginResponse response = LoginResponse.readObject(bodyBuffer);
            protobufFeature.setUseProtobufMapCodec(response.isUseProtobufMapCodec());
            return true;
        } catch (Throwable e) {
            LOGGER.error("decode login response failed.", e);
            return false;
        }
    }
}
